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/** @file dbwebserver.h
 */

/**
*    Copyright (C) 2008 10gen Inc.
*
*    This program is free software: you can redistribute it and/or  modify
*    it under the terms of the GNU Affero General Public License, version 3,
*    as published by the Free Software Foundation.
*
*    This program is distributed in the hope that it will be useful,
*    but WITHOUT ANY WARRANTY; without even the implied warranty of
*    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*    GNU Affero General Public License for more details.
*
*    You should have received a copy of the GNU Affero General Public License
*    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*
*    As a special exception, the copyright holders give permission to link the
*    code of portions of this program with the OpenSSL library under certain
*    conditions as described in each individual source file and distribute
*    linked combinations including the program with the OpenSSL library. You
*    must comply with the GNU Affero General Public License in all respects for
*    all of the code used other than as permitted herein. If you modify file(s)
*    with this exception, you may extend this exception to your version of the
*    file(s), but you are not obligated to do so. If you do not wish to do so,
*    delete this exception statement from your version. If you delete this
*    exception statement from all source files in the program, then also delete
*    it in the license file.
*/

#pragma once

#include <string>
#include <vector>

#include "mongo/base/disallow_copying.h"
#include "mongo/util/net/miniwebserver.h"
#include "mongo/util/net/sockaddr.h"

namespace mongo {

class AdminAccess;
class DbWebServer;
class OperationContext;
class ServiceContext;

class Prioritizable {
public:
    Prioritizable(double p) : _priority(p) {}
    double priority() const {
        return _priority;
    }

private:
    double _priority;
};

class DbWebHandler : public Prioritizable {
    MONGO_DISALLOW_COPYING(DbWebHandler);

public:
    DbWebHandler(const std::string& name, double priority, bool requiresREST);
    virtual ~DbWebHandler() {}

    virtual bool handles(const std::string& url) const {
        return url == _defaultUrl;
    }

    virtual bool requiresREST(const std::string& url) const {
        return _requiresREST;
    }

    virtual void handle(OperationContext* opCtx,
                        const char* rq,  // the full request
                        const std::string& url,
                        BSONObj params,
                        // set these and return them:
                        std::string& responseMsg,
                        int& responseCode,
                        std::vector<std::string>&
                            headers,  // if completely empty, content-type: text/html will be added
                        const SockAddr& from) = 0;

    std::string toString() const {
        return _toString;
    }
    static DbWebHandler* findHandler(const std::string& url);

private:
    std::string _name;
    bool _requiresREST;

    std::string _defaultUrl;
    std::string _toString;

    static std::vector<DbWebHandler*>* _handlers;
};


class WebStatusPlugin : public Prioritizable {
public:
    WebStatusPlugin(const std::string& secionName,
                    double priority,
                    const std::string& subheader = "");
    virtual ~WebStatusPlugin() {}

    virtual void run(OperationContext* opCtx, std::stringstream& ss) = 0;
    /** called when web server stats up */
    virtual void init() = 0;

    static void initAll();
    static void runAll(OperationContext* opCtx, std::stringstream& ss);

private:
    std::string _name;
    std::string _subHeading;
    static std::vector<WebStatusPlugin*>* _plugins;
};

class DbWebServer : public MiniWebServer {
public:
    DbWebServer(const std::string& ip, int port, ServiceContext* ctx, AdminAccess* webUsers);

private:
    virtual void doRequest(const char* rq,
                           std::string url,
                           std::string& responseMsg,
                           int& responseCode,
                           std::vector<std::string>& headers,
                           const SockAddr& from);

    bool _allowed(OperationContext* opCtx,
                  const char* rq,
                  std::vector<std::string>& headers,
                  const SockAddr& from);

    void _rejectREST(std::string& responseMsg,
                     int& responseCode,
                     std::vector<std::string>& headers);


    const std::unique_ptr<AdminAccess> _webUsers;
};

void webServerListenThread(std::shared_ptr<DbWebServer> dbWebServer);

std::string prettyHostName();
};